Unpoly by default changes the browser's history to the url of the modal. Thus when your refresh you'll get exactly that. You can modify that behavior with up-hi

Unpoly by default changes the browser's history to the url of the modal. Thus when your refresh you'll get exactly that. You can modify that behavior with up-history, see here https://unpoly.com/history-in-overlays https://unpoly.com/history-in-overlays